I haven't been able to find online references to the rules, and I don't own a code book.
We have a 300 gallon propane tank, with 5/8" copper line going to a standby generator and into the house for a boiler and range. All installed at the same time about 4 years ago when the house was built.
I recently had my propane tank moved about 10' so we can add on to our garage. The gas company originally told me I needed to replace all of my lines because it's a code violation to bury couplings with copper piping.
In an effort to avoid digging up ~50' of line, I called the propane contractor who did the original install 4 years ago. (I was referred to this contractor by someone I trust and who should know that he's qualified.) He said the gas company was using an old code book, that they were incorrect. He came and extended my line, which I backfilled, and called out the gas company's lift truck to move the tank.
When they came out to do the move, they pointed out multiple violations with the installation:
- buried couplings, 5/8" to 5/8", including a tee going to the generator
- the new coupling he put in -- to be buried -- was black iron (which seems like a bad idea even to me who knows very little about this stuff)
- the coupling going from 5/8" to the 3/8" line heading into the 2nd stage regulator at the garage was buried, including several feet of the uncoated 3/8" line
- buried uncoated copper (it's supposed to be plastic coated copper?)
So in the end I had to do all the digging and pay the gas company to replace my lines. I also have this bill from the contractor that I need to have refunded.
Where can I find references, preferably chapter and verse, to code requirements so that I have some leverage with him?
If it matters, I'm in New Hampshire (USA). (And no, my town doesn't have any local code enforcement.)